Mercurial > hg > CbC > CbC_gcc
annotate config/extensions.m4 @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 77e2b8dfacca |
| children |
| rev | line source |
|---|---|
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77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1 # serial 6 -*- Autoconf -*- |
| 0 | 2 # Enable extensions on systems that normally disable them. |
| 3 | |
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77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
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4 # Copyright (C) 2003, 2006, 2007, 2009 Free Software Foundation, Inc. |
| 0 | 5 # This file is free software; the Free Software Foundation |
| 6 # gives unlimited permission to copy and/or distribute it, | |
| 7 # with or without modifications, as long as this notice is preserved. | |
| 8 | |
| 9 # This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS | |
| 10 # Autoconf. Perhaps we can remove this once we can assume Autoconf | |
| 11 # 2.62 or later everywhere, but since CVS Autoconf mutates rapidly | |
| 12 # enough in this area it's likely we'll need to redefine | |
| 13 # AC_USE_SYSTEM_EXTENSIONS for quite some time. | |
| 14 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
15 m4_version_prereq([2.62],, [ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
16 |
| 0 | 17 # AC_USE_SYSTEM_EXTENSIONS |
| 18 # ------------------------ | |
| 19 # Enable extensions on systems that normally disable them, | |
| 20 # typically due to standards-conformance issues. | |
| 21 # Remember that #undef in AH_VERBATIM gets replaced with #define by | |
| 22 # AC_DEFINE. The goal here is to define all known feature-enabling | |
| 23 # macros, then, if reports of conflicts are made, disable macros that | |
| 24 # cause problems on some platforms (such as __EXTENSIONS__). | |
| 25 AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS], | |
| 26 [AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl | |
| 27 AC_BEFORE([$0], [AC_RUN_IFELSE])dnl | |
| 28 | |
| 29 AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=]) | |
| 30 if test "$MINIX" = yes; then | |
| 31 AC_DEFINE([_POSIX_SOURCE], [1], | |
| 32 [Define to 1 if you need to in order for `stat' and other | |
| 33 things to work.]) | |
| 34 AC_DEFINE([_POSIX_1_SOURCE], [2], | |
| 35 [Define to 2 if the system does not provide POSIX.1 features | |
| 36 except with this defined.]) | |
| 37 AC_DEFINE([_MINIX], [1], | |
| 38 [Define to 1 if on MINIX.]) | |
| 39 fi | |
| 40 | |
| 41 AH_VERBATIM([__EXTENSIONS__], | |
| 42 [/* Enable extensions on AIX 3, Interix. */ | |
| 43 #ifndef _ALL_SOURCE | |
| 44 # undef _ALL_SOURCE | |
| 45 #endif | |
| 46 /* Enable GNU extensions on systems that have them. */ | |
| 47 #ifndef _GNU_SOURCE | |
| 48 # undef _GNU_SOURCE | |
| 49 #endif | |
| 50 /* Enable threading extensions on Solaris. */ | |
| 51 #ifndef _POSIX_PTHREAD_SEMANTICS | |
| 52 # undef _POSIX_PTHREAD_SEMANTICS | |
| 53 #endif | |
| 54 /* Enable extensions on HP NonStop. */ | |
| 55 #ifndef _TANDEM_SOURCE | |
| 56 # undef _TANDEM_SOURCE | |
| 57 #endif | |
| 58 /* Enable general extensions on Solaris. */ | |
| 59 #ifndef __EXTENSIONS__ | |
| 60 # undef __EXTENSIONS__ | |
| 61 #endif | |
| 62 ]) | |
| 63 AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__], | |
| 64 [ac_cv_safe_to_define___extensions__], | |
| 65 [AC_COMPILE_IFELSE( | |
| 66 [AC_LANG_PROGRAM([ | |
| 67 # define __EXTENSIONS__ 1 | |
| 68 AC_INCLUDES_DEFAULT])], | |
| 69 [ac_cv_safe_to_define___extensions__=yes], | |
| 70 [ac_cv_safe_to_define___extensions__=no])]) | |
| 71 test $ac_cv_safe_to_define___extensions__ = yes && | |
| 72 AC_DEFINE([__EXTENSIONS__]) | |
| 73 AC_DEFINE([_ALL_SOURCE]) | |
| 74 AC_DEFINE([_GNU_SOURCE]) | |
| 75 AC_DEFINE([_POSIX_PTHREAD_SEMANTICS]) | |
| 76 AC_DEFINE([_TANDEM_SOURCE]) | |
| 77 ])# AC_USE_SYSTEM_EXTENSIONS | |
| 78 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
79 ]) |